Which equations are in standard form? Check all that apply y = 2x + 5 2x + 3y = –6 –4x + 3y = 12 y = y equals StartFraction 3 Ov
er 2 EndFraction x minus 9.x – 9 StartFraction one-half EndFraction x plus 3 equals 6.x + 3 = 6 x – y = 5 5x + 3y = 5 x plus 3 y equals StartFraction one-half EndFraction.
